Particle film technology

Definition

A pest management and crop protection method that applies a uniform, porous barrier of microscopic mineral particles (typically kaolin clay) onto plant surfaces. The particle film alters leaf reflectance, texture, and microclimate, thereby deterring insect herbivores, reducing oviposition, and interfering with host-finding behavior without direct toxicity to the arthropod. The technology also provides incidental benefits including reduced heat stress, water conservation, and protection against sunburn.

Etymology

Example

Application of a kaolin-based particle film to apple trees reduces feeding damage by codling moth (Cydia pomonella) larvae and pear psylla (Cacopsylla pyricola) by masking host-plant chemical and visual cues, often decreasing insecticide use in integrated pest management programs.

Synonyms

• particle film
• kaolin film technology

Related Terms

• Integrated Pest Management
• host-plant resistance
• antixenosis
• oviposition deterrent
• kaolin
• reflectance-mediated defense
• crop protection

Usage Notes

Distinguished from traditional insecticidal coatings by its non-toxic, physical mode of action. Effectiveness varies by arthropod species: highly effective against folivores and sap-feeders that rely on tactile and chemical cues, but less effective against borers or insects with strong ovipositional drive. The film must be reapplied after rainfall. Not to be confused with film-forming antitranspirants or horticultural oils, which function through different mechanisms.